Carbureter.



. W. `HEIDBLISIIAIIN.`

' UARBUBBTBR.

APILIOATION FILED HAY 18I 1812.

Patented May 27, 1913.

.Inv/213737Z",

' Maf-m.

luv? UNllED STATES' PATENT @Fl-titl@ WILHELM HEIDELMANN,"oFBRUNsWroK, ennuient".

mancuerna.

f conduit, particularly during the first Worin" in-gr ofsthe motor, while the Walls of the tuheget covered with particles of soot.

Vlhis'occurs each time the motor is, started,

and especially inthe case of automobiles, such heating- 'passages are often found to be clogged to such degree as to put the car hureter out ,of action;` It the passage were ot'large sectional area and kept clean, there Wouldfonfthe other hand be danger of spontaneous ignition of the mixture.

The present invention has for its object to "obviate these defects, and its main feature consists in the arrangement that a lever pivoted. within the carburetor, casing;` and carrying the air and fuelinlet valves, has a part which constitutes avaporizing surface and which cornes into intermittent contact with a Wall of a chamber heated by the eX- haust gases.

The carburetor according to my invention is intended to be attached directly to the exhaust Valve chamber of the motors 'that the chambervirtually forms part ot the exhaust passage. The walls of the ltharnbcr become extremely hot, yet spontaneous ignition of the mixture cannot take place, since the vaporizing surface portion f the lever absorbs heat from the chamber only during short intervals of Contact therewith.

The carburetor' according to this invention is illustrated in the accompanying drawing in Which- Figure l is a sectional side elevation, and Fig. l is a horizontal section at A-B respectively. I

The carburcter consists of a casing b connected to the suction pipe a of the engine cylinder or the like. At the bottoinof the said casing is provided a pipe or extension' c 'for the supply of air, and a pipe al for the supply of liquid fuel.

Patentes ev, iets,

Application tiled May 1S, 1912. Serial No. 693,236.

Accordingto this invent-ion the pipe o for the supply clair, is closed hy a valve e secured to a long, fairly wide;1 lever f hentin an' arc and provided, near its pivot point g, above the fuel supply pipe with the conical closingvalve h. for the latter. The valve k .is shown as carried by the end of a stern out of normal to the plete ,16, so that when this plate litts, the valve is moved laterally clear ot the nozzle, which allows the fuel jet. to impin 'e unobstructedly on the plate f. Around t e mouth of the fuel. supply pipe d, in the casing o is provided a strip of sheet metal i which is bent in the opposite direction to the curve of the lever j. In the casing is provided a chamber la, the bottom face of which is curved to suit the curva-ture of the lei/*er i A centrally guided rod Z is used for lifting the alve e, and a screw m enables the litt of t essid valve to he' regulated.

- The operation of the device is as tol- Vlovvs.Vlfhen,theme,v/ernent oi" the piston in the engine cylinder produces a reduction of pressure in the suction i e air'enters in throxgh the ipe c an lifts the valve c. Sim .ltaneous y with that lifting, duringl which the lever f turns about the point g, the conical valve It is lifted from its seat on the fuel supply pipe, and .fuel is admitted through the spraying nozzle into vthe casing Z). A light fuel, such ester instance petrol, is vaporized immediately on coming out from the nozzle. lrleavier fuels on the con' trary must be specially prepared for vaporizing. To that end, the chamber ,lf is pio vided and is heated by the hot exhaust gases ot' the engine, Thev bottom Wall of the charm ber fr: is curved so that each time thetvalve is lifted, the lever f coines into contactvvith its highly heated surface, and is itsellE heated. to a certain extent, or to a sulicientextent to convert into vapor at once heavyjucls which are sprayed from the nozzle against 4the lever Itis of great importance thatthelever f, which also forms a. movable Wall against which the `t'uelv ixnpinges after leaving the spraying nozzle, should not be constantly in contact with the highly heated chan'iber wall, but should only come into contact with the same intermittently. ln that way, the surface of the lever f is prevented y trom becoming too hot and bringing about spontaneous ignition of the fuel or vapor. The guide or baille plate 'i arranged below the nozzle7 guides the current of vapor along the hot surface of the lever f, so that even when heavy fuels are used, cflieient vaporization insured. The bottom part of the casl inggli .is formed into a tray n around .the inl )echt-minerale, and is used for collecting the l fuelA ,escaping from .the nozzle when the valve l c is raised by the rod Z. before the engine is l started.

'The-lever f' can be so designed that the I weight of the valve e together with the lever action, produces a firm Contact 0f the conical valve it with the nozzle of the fuel supply pipe. When a carbureter such as described is refpiired to work in any position, for instance in aerial machines, the weight action f of the valve e must be replaced by a spring action.

l. In a Carlini-eter, a casing having air and fuel inlets, a chamber within thc casing and'. adapted to reeeivc ivas'te gases, a fuel vaporizing surface in the form of a plate lever pivoted within the easing and so disposed as to come intermittently into heat absorbingl contact with a wall of the chamber, a valve for the air inlet attached to' the lever, and a valve for the fuel inlet controlled by the lever.

2. In a earhureter, a casing, a chamber within the casing and adapted to reeeivel traste gases, a fuel vaporizing surface in the form of a plate lever pivoted Within the casing and so disposed as to come intermittently into heat absorbing Contact' with a wall of the chamber, an air inlet, a valve i controlling the air inlet and carried by the free end of the plate lever, a fuel inletsituated opposite'the, heated part of thc plate lever, and a valve for the fuel inlet controlled by the level'. 40

3. In a carbureter, a Casin havingair and fuel inlets, a chamber heated by waste gasesv and arranged within the casing at the upper part thereof, a fuel va-porizing surface conforming with the lower Wall of the chamber and forming part of a plate lever pivoted at one end within the casing, a valve for the air inlet carriedv by the other end of the lever, and a valve for thefuel inlet carried by the part of the lever contacting with the chamber.

4. In a carbureter, a easing having air and .fuel inlets, a chamber heated by waste gases and arrangedwithin the casing, a fuel vapor zing surface in the form of a plate lever pivoted within the casing and so disposed as to come intermittently into heat absorbing contact with a wall of the chamber, a valve for the. air inlet carried by the free end of the leveri'and a valve for the fuel inlet carried by the stem oblique to the lever and fixed to the middle part thereof.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

VILHELM HEIDELMANN.

Witnesses HEINRICH BoRozK, FRIEDA BARTELS. 

